NTFS file level permission doesn’t work on w2k server

I’m trying to implement NTFS file level permission but they are not working. If I implement NTFS permission on folder, they are working perfectly.

Here is the case:

I created share “test” and I set share permission to everyone: FULL and Folder level NTFS permission: FULL and I added “usera” and he has same perimssion as everyone.

I created file under test folder call “abc.txt” and set NTFS permission to: READ. for everyone and usersa (local user on windows 2000 server).

When I access file abc.txt as “usera” and he is able to modify the file which he not suppose to because he has read permission on file level.

No user or group is involved from the domain. Every thing is local.

any idea…

thanks for help in advance.